Correct

铆劲儿

/ mǎo jìnr / 
Strokes

Definition

to apply all one's strength in a burst of effort

Example

As a Verb

make sudden all-out effort

1
Tā
他
yī
一
mǎo
铆
jìnr  
劲儿
jiù
就
bǎ
把
chéndiàndiàn
沉甸甸
de
的
xiāngzi
箱子
jǔ
举
guò
过
tóudǐng
头顶
le
了
  
。

With a sudden effort, he lifted the heavy box over his head.

As a Verb

match strength; compete; vie; contest

2
Tā
他
zài
在
xuéxí
学习
shàng
上
yú
与
wǒ
我
mǎo
铆
shàng
上
jìnr  
劲儿
le
了
  
。

He is trying to excel me in study.